韩国采购需求：碳钢管、钢管、钢管、碳管、碳管、ERW钢管

I'm looking for detailed information on a square pipe with dimensions of 150mm by 6mm thickness, specifically produced through Direct Forming Technology (DFT). It's important that this product is ASTM certified to meet our quality standards. Additionally, I'd appreciate it if you could provide specifications regarding the material properties, any available grades, and lead times for production. If you have any datasheets or relevant documentation, please include that as well. Thank you!